Engine.



Patented Feb. 9, 1909.

lli/A ENGINE.

APPLICATION FILED I I:o.9,13994 W. H. MOLEOD.

invirnn snirns rkrnnronnion c V y WILLIAM H. MCLnoD, orBoSTo..,fiiASsAonUsnTrs- -I ENGINE-1."

No. 911,670.A Specification of Application filed December 9, '1899. Serial No. "(39,7{l6

the exhaust in internal-combustion motors and for increasing the power of such engin es Aby reducing' the back pressure of the exhaust gases onthe engine'piston;v d

The exhaust gases ci the ordinary4 inter-- nal-combustion engine are-delivered at a hightemperature and pressure, and various dei vices are used for dissi ating them Without objectionable noise. uch devices consist usually oi' closed chambers provided with more or less restricted outlets and 'with bafiles of variousforms to impede the ilow of the gases, and these devices result in a substantial back-pressure on the engine piston, caus- -ing loss or powei'.

.The object of the resent invention is to reduce the noise oi' 't ie exhaust of an. internal-combustion engine without producing back presure, and the invention consists in the a plication to the exhaust pipe of an interna #combustion engine of certain devices forcooling the gases in their passageltherethrough whereby the pressure and volume of the gases are reduced without obstruction to their i'low.- These devices are particularly applicable to engines used in marinework, and may be used with or Without a muffler of ordinary forni. .Y

ln the drawings Figure l is a vertical section of an apparatus embodying the present invention, l* 2 isa vertical section showing in detail the packing joint connecting the ex- `haust,pipe and the well, lfig. 3 is a detail vertical section al view taken at the bottom of the well and Fig. 4 is a detail vertical sectional view of the jacket valve.

ln the illustrated embodiment of thc-invention the engine proper l which is shown as mounted in a power launch is provided with an exhaust chamber 2 connected by means of an exhaust pipe S with a muffler 4. The muffler is connected by a pipe 5 with the exterior of the launch. A portion of the ex- Ltters Patent. patented Feb. e,- ieoe,

immersed in'thefw'ater and thereby kept'cooi. The ortion extending from the exhaust chamerto the-bottom ofthe launch can.

' haust pipeas strowninli'gsl 'and 3 passes outside of the hull of thelaunch' seas to be not, howeven-be kept coolin; this manner and therefore this part of thefexhaust pipe is surroundedby -a well G extending' upward from the bottom'v of the launch to a' point near theexhaust chamber 2 so that this portion of .the exhaust` pipe is kept cool by the water which risesin the well and the exhaust i.

gases in passing through the exhainit *pipey are' i almost immediately cooledi and reduced in fvohimesoI that bythe timethey enter the muiiler the volume issulstantially less than A'atf'the time of the issuance from the engin'e cylinderfand `theJ nofise produced by the final discharge of the exhaust gases through the `pipe 5 is reduced to a minimum.

A The l means o pi e 8 with the water jacket of the engine, whic is of theinternal-coinbustion type, and this water `ja'cketis kept supplied during the operation of the engine by means of a pump 25, the pi e Siserving as an overflow, and thus the we l 6 serves'to receive the' water flowing from the jacket aswell as to cool the exhaust pipe. The upper end of the well 6 is provided with a stui'ling box 9 and upper end of the well is connected by i a glandl() between which a flexible packing ring'll is compressed against the exhaust pipe. This connection allows for lrelative movement of the exhaust pipe and the well due to vibrations of the 'engine or other causes and reduces `the transmission of vibrae tions to the hull ofthe launch from the engine. The lower end `olf-fthe pipe-Which forms the well is screwed into a flange collar 13 'corresponding with a collar 14 on the outside of the hul the two collars being secured to' getherby bolts 15 and making a water tight joint between the well and the hull.` The exhaust pipe.3 is provided with' a flange 17 by which it is securedto the l'muflier andv a valve seat 18 to whicha check valve 19 is pivoted.

spring 2 l connected to a fixed yoke 20 on the valve scat and the valve serves to prevent f the return of 'exhaust gases into the exhaust pipe after the emission ofthe exhaust from the engine ceases and a partial vacuum is produced in the exhaust pipe through the cooling of the gases therein. Thisvalve is n ot an essential featureof the present invention although it conduces to'its utility'. The

This miv@ is provid-ed with la;

mouth 22 of the-outlet -pipe `5 is stued with a loose packing 23 to reduceth'e noise of the exhaust. f TheA invention is not limited to the 'details of construction and operation of the illustrated embodiment. but may be embodied in other forms broadly definedin the claims.

Icl'airn--el'` 1 l. A launch, having, in combination, a hydro-carbon gn'otor, a 'Well communicating with the Water outside of the launch, andan exhaust pipe 4Jfor the motor passin through the Well, substantially' as Iiescribc I 2. A launch, having, in combination, a hydro-carbon motor, a-well communicating with the Water outsideof the launch, an-exhaust pipe for the-motor passing through the4 Well, andnieans iorforcing Water through the Well, substantially as described. y

20 3. A launch, having, in combination, a

Vhydr-u`carbo motor,

,'halistpi e fonthezmotor scribed.' if" t a 'well connnunicating with'lthe wateroutside of the launch, anexpassing through the Well, an' 'a packing joint 1n said well throu h Ahich said pipe passes, substantially as e- A. A itunch, -having,

'in combi-nation, a

hydro-carbon -motor provided VWith a`-water jacket, 'a Well communicating with the Water outside'of the launch,` an exhaust pi 'e for the motorzpassingthrough the Well, an 4connections between the Water jacket andthe Well,

substantially as described'.

y Intestiinony whereof I aix my signature, in presence of two Witnesses.

WILLIAi/rv n. MCLEOD. i

Witnesses:4

HORACE VAN AETIEREN, A. HART ANDERSON. 

